Description : An unknown substance (P) functions as weak base in water. It produces silver mirror test. It reacts with dilute `HCl` to produce (Q) which turns blue
Last Answer : An unknown substance (P) functions as weak base in water. It produces silver mirror test. It reacts with dilute `HCl` ... ` C. `NH_(2)OH` D. `HPO_(3)`
Description : A crystalline solid X reacts with dilute HCl to liberate a gas Y. The gas Y decolourises acidified `KMnO_(4)`. When a gas Z is slowly passed into aque
Last Answer : A crystalline solid X reacts with dilute HCl to liberate a gas Y. The gas Y decolourises acidified `KMnO_(4)`. When ... 2)S` D. `Na_(2)SO_(4),SO_(2)`
Description : Componds `(A)` and `B` are treated with dilute `HCl` separately. The gases liberated are `Y` and `Z` respectively. `Y` turns acidified `K_2 Cr_2 O_7`
Last Answer : Componds `(A)` and `B` are treated with dilute `HCl` separately. The gases liberated are `Y` and `Z` ... )SO_(4)` D. `NaC1 and Na_(2)CO_(3)`
Description : A compound, C4H6, reacts with bromine and forms a white precipitate with ammoniacal silver nitrate solution. It reacts with dilute H2SO4 in the presence of mercuric sulfate to form 2-butanone. The compound could be (a) 1-Butyne (b) 1-Butene (c) 2-Butyne (d) 2-Butene
Last Answer : 1-Butyne
Description : When black copper oxide placed in a beaker is treated with dilute HCl, its colour changes to......... a) Whiteb) Red c) Blue-green d) No change
Last Answer : c) Blue-green
Description : The heat of neutralisation remains constant, when there is a reaction between dilute solutions of strong (A) Base and strong acid (B) Base and weak acid (C) Acid and weak base (D) None of these
Last Answer : Option A
Description : Which of the following statements is false about aniline? (a) It is a primary aromatic amine. (b) It is a weak base which forms salts with acids. (c) It liberates nitrogen on treatment with ice-cold nitrous acid. (d) It can be prepared by the reduction of nitrobenzene with tin and HCl
Last Answer : It liberates nitrogen on treatment with ice-cold nitrous acid
Description : 10.(a) An ore on treatment with dilute hydrochloric acid produces brisk effervesces. What type of ore is this? What steps will be required to obtain metal from the enriched ore. , (b) ... in coin and colour of the solution ? Write balanced chemical equation of the reaction involved. -Chemistry
Last Answer : (a) Carbonate ore: (i) Calcination: Carbonate ore is heated in limited supply of air and oxide is obtained, e.g. (b) Copper, being more reactive than silver will displace silver from silver nitrate ... and there will be deposition of silver on copper coin. The colour of solution will turn to blue.
Description : Pick out the wrong statement. (A) Dehydration of ammonium carbamate to produce urea is endothermic (B) Direct use of liquid ammonia as a fertiliser for a tropical country like India ... manufacture of ortho-phosphoric acid (D) Phosphate rock when reacted with dilute H2SO4 produces superphosphate
Last Answer : (B) Direct use of liquid ammonia as a fertiliser for a tropical country like India is suitable
Description : The reactions of `CI_(2)` gas with cold-dilute and hot-concentrated NaOH in water give sodium salts of two different oxioacids of chlorine, P and Q, r
Last Answer : The reactions of `CI_(2)` gas with cold-dilute and hot-concentrated NaOH in water give sodium salts of ... `H_3PO_2` D. `SOCl_2 , PCl_5` and `H_3PO_5`
Last Answer : The reactions of `CI_(2)` gas with cold-dilute and hot-concentrated NaOH in water give ... porchloric acids D. (D) chloric and hypochlorus acids
Description : Compound A(`C_7H_8O`)is insoluble in water, dilute HCl & aqueous `NaHCO_3`, it dissolves in dilute NaOH.When A is treatedwith `Br_2` water it is conve
Last Answer : Compound A(`C_7H_8O`)is insoluble in water, dilute HCl & aqueous `NaHCO_3`, it dissolves in dilute NaOH.When A ... . The structure ofA is A. B. C. D.
Description : Compound `A,C_(7)H_(8)O`, is insoluble in water, dilute `HCl`, and aquenous `NaHCO_(3)`, it dissolves in dilute `NaOH`. When `A` is treated with bromi
Last Answer : Compound `A,C_(7)H_(8)O`, is insoluble in water, dilute `HCl`, and aquenous `NaHCO_(3)`, it ... . o-cresol B. m-cresol C. p-cresol D. anisole
Description : Lead pipes are not safe for carrying drinking water, because water, containing dissolved oxygen attacks lead thereby forming poisonous Pb(OH)2 . Lead pipes are readily corroded by (A) Dilute HCl (B) Acetic acid (C) Concentrated H2SO4 (D) None of these
Last Answer : (B) Acetic acid
Description : (2) brown bottles stops the passage of light through it Explanation: Silver Nitrate is stored in dark bottles in a laboratory to prevent chemical reactions as it is sensitive to light. It reacts to light to produce silver metal.
Last Answer : In upper layer of atmosphere ozone is formed by - (1) the action of ultraviolet rays on oxygen (2) the combination of oxygen molecules (3) subjecting oxygen to high pressure (4) the action of nitrogen on oxygen in atmosphere
Description : In the circuit shown here, what is the value of the unknown resistor R so that the total resistance of the circuit between points P and Q is also equa
Last Answer : In the circuit shown here, what is the value of the unknown resistor R so that the total resistance of the ... ` C. `sqrt(69)Omega` D. `10 Omega`
Description : Ion which is not present in dilute HCl.
Last Answer : Ion which is not present in dilute HCl. A. `H^(+)` B. `H_(3)O^(+)` C. `Cl^(-)` D. `HCl`
Description : A salt solution of `Cd^(2+)` in dilute HCl, on treatment with a solution of `BaCl_(2)` gives a white precipitate, which is insoluble in concentrated `
Last Answer : A salt solution of `Cd^(2+)` in dilute HCl, on treatment with a solution of `BaCl_(2)` gives a white precipitate, ... C. `NO_(2)^(-)` D. `S^(2-)`
Description : The metal that does not give H2 on treatment with dilute HCl is (a) Zn (b) Fe (c) Ag (d) Ca
Last Answer : Ans:(c)
Description : he metal does not give H2 on treatment with dilute HCL is?
Last Answer : :Ag
Description : Glass lined vessels are not used for handling/storing (A) Dilute H2SO4 (B) Dilute HNO3 (C) Dilute HCl (D) Hydrofluoric acid
Last Answer : (D) Hydrofluoric acid
Description : What happen when mango is placed in dilute aqueous soln. of HCl?
Last Answer : Ans. When mango is placed in dilute aqueous soln. of HCl it swells.
Description : Ammonia present in the coke oven gas is removed by washing with (A) Caustic solution (B) Dilute ammoniacal liquor (C) Dilute HCl (D) Ethanolamine
Last Answer : (B) Dilute ammoniacal liquor
Description : Flushing liquor used for cooling coke oven gas constitutes of (A) Ammoniacal liquor (B) K2CO3 solution (C) Dilute H2SO4 (D) Dilute HCl
Last Answer : (A) Ammoniacal liquor
Description : Phosphoric acid is produced in wet process from phosphate rock and (A) Dilute H2SO4 (B) Concentrated H2SO4 (C) Concentrated NHO3 (D) Concentrated HCl
Last Answer : (A) Dilute H2SO4
Description : Ethyl acetoacetate undergoes acid-hydrolysis with dilute HCl to form (a) Acetoacetic acid (b) Succinic acid (c) Acetic acid (d) Adipic acid
Last Answer : Acetoacetic acid
Description : Which of the following compounds does not form a salt with dilute HCl? (a) CH3CH2CONH2 (b) (CH3CH2)2NH (c) CH3CH2NH2 (d) (CH3CH2)3N
Last Answer : CH3CH2CONH2
Description : Baeyer's reagent is (a) dilute KMnO4 (b) HCl + ZnCl2 (c) Br2 in CCl4 (d) NH2NH2
Last Answer : dilute KMnO4
Description : A combustion reaction occurs when a substance, usually containing carbon reacts with to produce energy in the form of heat and light?
Last Answer : Oxygen.
Description : What is the substance that reacts with hydrochloric acid to produce chlorine gas?
Last Answer : This compound is the manganese dioxide, MnO2.
Description : My blue star juniper has a yellow gummy substance foam that turns crusty when it dries. What is it?
Last Answer : Need Answer
Description : Write balanced chemical equations for the following reactions: (a) Dilute sulphuric acid reacts with aluminium powder. (b) Dilute hydrochloric acid reacts with sodium carbonate. (c) Carbon dioxide is passed through lime water. -Chemistry
Last Answer : i hope it helped you
Description : Which gas is always produced if a metal reacts with water or dilute acid?
Last Answer : Hydrogen
Description : When chlorine reacts with cold and dilute solution of sodium hydroxide, the products obtained are
Last Answer : When chlorine reacts with cold and dilute solution of sodium hydroxide, the products obtained are A. (1) `ClO_2^ ... ClO_2^-` D. `ClO^-` and `ClO_3^-`
Description : Hydrogen peroxide solution `(20 mL)` reacts quantitatively with a solution of `KMnO_(4) (20 mL)` acidified with dilute of `H_(2)SO_(4)`. The same volu
Last Answer : Hydrogen peroxide solution `(20 mL)` reacts quantitatively with a solution of `KMnO_(4) (20 mL)` ... calculate the molarity of `H_(2)O_(2)`.
Description : A white solid reacts with dilute HCI to give colourless gas that de-colourises aqueous bromine. The solid is likely to be.
Last Answer : A white solid reacts with dilute HCI to give colourless gas that de-colourises aqueous bromine. ... chloride C. Sodium acetate D. Sodium thiosulphate
Description : When Metal carbonate reacts with dilute acids, what does it forms?
Last Answer : CO2
Description : Give reason: a) Magnesium reacts more vigorously with hydrochloric acid than zinc or copper. b) Iron takes more time to react with dilute hydrochloric acid than magnesium and zinc
Last Answer : a) Magnesium reacts more vigorously with hydrochloric acid than zinc or copper. The reactivity of magnesium is higher than that of zinc. Hence it reacts with hydrochloric acid more vigorously. b) ... acid than magnesium and zinc As iron has lowest reactivity when compare to magnesium and zinc.
Description : ________ does not react with dilute hydrochloric acid but reacts with sulphuric acid and does not liberate hydrogen gas. a) iron b)copper c)gold d)zinc
Last Answer : b)copper
Description : Aniline reacts with mixed acid (conc. `HNO_(3)` and conc. `H_(2)SO_(4)`) at 288 K to give P (51%), Q (47%) and R(2%). The major product (s) of the fol
Last Answer : Aniline reacts with mixed acid (conc. `HNO_(3)` and conc. `H_(2)SO_(4)`) at 288 K to give P ... of the following reaction sequence is (are) B. C. D.
Description : A person walks from point P to point Q along a straight road ¡n 10 minutes, then turns back and returns to point R which is midway
Last Answer : A person walks from point P to point Q along a straight road n 10 minutes, then turns back and ... velocity of the person in going from P to R.
Description : The appearance of a silver mirror in Tollens' test indicates the presence of : (a) an aldehyde (b) a ketone (c) an alcohol (d) an alkene
Last Answer : an aldehyde
Description : Write chemical equation reactions taking place when carried out with the help of (a) Iron reacts with steam (b) Magnesium reacts with dil HCl (c) Copper is heated in air. -Chemistry
Last Answer : This is the Answer.
Description : The amount of heat liberated when one mole of `NH_(4)OH` reacts with one mole of HCl is
Last Answer : The amount of heat liberated when one mole of `NH_(4)OH` reacts with one mole of HCl is A. 13.7 ... Kcal C. Less than 13.7 Kcal D. Cannot be prodicted
Description : Which of the following oxides reacts with both HCl and NaOH?
Last Answer : Which of the following oxides reacts with both HCl and NaOH? A. CaO B. ZnO C. `N_(2)O_(5)` D. `CO_(2)`
Description : Pyridine reacts with HCl to form (a) Pyridinium chloride (b) 2-Chloropyridine (c) 3-Chloropyridine (d) All of these
Last Answer : Pyridinium chloride
Description : Predict which of the following alkenes reacts the fastest with HCl? (a) CH3CH2CH2CH2CH=CH2 (b) cis-CH3CH2CH=CHCH2CH3 (c) trans-CH3CH2CH=CHCH2CH3 (d) (CH3)2C=CHCH2CH3
Last Answer : (CH3)2C=CHCH2CH3
Description : The ‘acid neutralizing capacity’ of an antacid is governed by: A. The equivalent weight of the antacid B. The pH of 1N solution of the antacid C. The rate at which the antacid reacts with HCl D. Both ‘A’ and ‘C’
Last Answer : D. Both ‘A’ and ‘C’
Description : An organic acid P `(C_(11)H_(12)O_(2))` can easily be oxidized to a dibasic acid which reacts with ethyleneglycol to produce a polymer dacron. Upon oz
Last Answer : An organic acid P `(C_(11)H_(12)O_(2))` can easily be oxidized to a dibasic acid which reacts with ... produce S. The compound S is A. B. C. D.
Last Answer : An organic acid P `(C_(11)H_(12)O_(2))` can easily be oxidized to a dibasic acid which reacts with ... produce S. The compound R is A. B. C. D.